Long set up with the winning putt with the 6-iron approach from 175 yards with the ball below his feet in dormant grass on a mound to the right of the fairway.

Long then had this 14-footer for his first PGA Tour win.

"One of those putts that you just stand over and know you're gonna make", Long said. "I'm certainly surprised that it has clicked".

"I'm looking forward to tomorrow", Hadwin said.

"I just have to keep working hard".

The 43-time PGA Tour victor drained a 35-footer at the par-three 13th for the first of back-to-back birdies to reclaim top spot, before adding another from 25 feet on his penultimate hole.

"My goal or game plan of playing the Stadium Course is to actually hit drivers and to try to bomb it down there as close to the greens as you can", Mickelson said. "Hopefully, I just keep the mojo that I had past year going".

Curtis Luck was second after a 66 on the Nicklaus layout. The Canadian has three straight top-six finishes in the event. He shot a 13-under 59 in the third round of the 2017 edition of the Desert Classic, when he also finished second, and that was on his mind as he closed in on the 18th hole Sunday.

"The last two to three years, even four years, on the Web.com Tour I've progressed".

"Every time I'm in that situation, I get more and more comfortable in it". This is a good thing, even though I know he wants to play a full schedule, and I hope we see more of it as the year rolls on.

Mickelson finished with five birdies - draining a six-footer at 15th and a 10-footer at 16th to regain a share of the lead. Amazingly he led the field last week in driving distance, and he seems to have (finally) recognized that some courses just don't fit him all that well. "You can't control that, but when you have that feeling it's a good one". "I feel like I can play aggressively with the way I'm hitting it off the tee".

Adam Long, with a sizzling nine-under 63, was a stroke behind Hadwin on 19-under, with fellow American Steve Marino (67) at 18-under.

Scot Russell Knox went around on 69 to finish on 16 under and tied for 18th, while England's Justin Rose fell five places to tied 34th with a round of 70.

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